Python实现冒泡，插入，选择排序简单实例

本文所述的python实现冒泡，插入，选择排序简单实例比较适合python初学者从基础开始学习数据结构和算法，示例简单易懂，具体代码如下：

# -*- coding: cp936 -*-
#python插入排序
def insertsort(a):
  for i in range(len(a)-1):
    #print a,i 
    for j in range(i+1,len(a)):
      if a[i]>a[j]:
        temp = a[i]
        a[i] = a[j]
        a[j] = temp
  return a

#python的冒泡排序  
def bubblesort(alist):
  for passnum in range(len(alist)-1,0,-1):
    #print alist,passnum
    for i in range(passnum):
      if alist[i]>alist[i+1]:
        temp = alist[i]
        alist[i] = alist[i+1]
        alist[i+1] = temp
  return alist

#python的选择排序 
def selectionsort(alist):
  for i in range(len(alist)-1,0,-1):
    maxone = 0
    for j in range(1,i+1):
      if alist[j]>alist[maxone]:
        maxone = j
    temp = alist[i] 
    alist[i] = alist[maxone]
    alist[maxone] = temp 
  return alist

alist = [54,26,93,17,77,31,44,55,20]
#print bubblesort(alist)
alist = [54,26,93,17,77,31,44,55,20]
print selectionsort(alist)

感兴趣的朋友可以动手测试一下本文实例，相信会有新的收获。